#![allow(unused_variables)]
fn main() {
    use std::ffi::CString;
    let nul_error = CString::new("foo\0bar").unwrap_err();
    assert_eq!(nul_error.nul_position(), 3);
    let nul_error = CString::new("foo bar\0").unwrap_err();
    assert_eq!(nul_error.nul_position(), 7);
}